#include <string>
#include <regex>
#include <iostream>

int main()
{
        std::string s;
        s += '\x06';
        s += '\x00';
        std::regex r(std::string(1, '\x06') + R"(\0)");
        std::smatch sm;
        if (std::regex_search(s, sm, r))
        {
                std::cout << "Success\n";
                return 0;
        }

        std::cout << "Failure\n";
}